Please assess the completion status of the following clinical trial:

Trial Title: Study of Anlotinib in Patients With Medullary Thyroid Carcinoma(ALTER01031)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2/PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. Signed and dated informed consent~2. Histological documentation of medullary thyroid carcinoma(MTC),Unable to surgery(Stage IV) or metastasis ,With measurable disease (using RECIST1.1)~3. ECOG PS:0-1,Life expectancy of more than 6 months~4. main organs function is normal~Exclusion Criteria:~1. Prior treatment with Anlotinib or VEGFR-targeted therapies(such as Vandetanib,Cabozantinib,Lenvatinib,Sunitinib,Sorafenib etc.)~2. Subjects received radiotherapy external exposure within 3 months prior to the first dose of study drug or plan to be received any anti-cancer treatment during study~3. Patients suffering from other malignancies currently or within 5 years, except for cured cervical carcinoma in situ, non-melanoma skin cancers and superficial bladder cancer \[ Ta (non-invasive carcinoma), Tis (carcinoma in situ) and T1 (carcinoma invasion into lamina propria) \]~4. CTCAE(4.0) Grade 1 or higher non-remission toxicity induced by any other previous treatments，excluding alopecia and Grade 2 or lower neurotoxicity induced by oxaliplatin~5. Patients with factors that could affect oral medication (such as dysphagia etc.)~6. Patients with pleural effusion or ascites, causing respiratory syndrome (CTCAE Grade 2 or higher dyspnea \[Grade 2 dyspnea refers to Shortness of breath with a small amount of activities, affecting Instrumental activities of daily life\])~7. Patients underwent major surgical treatment，open biopsy or significant traumatic injury within 28 days prior to assignment

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

Study Arms:
- Anlotinib (Type: EXPERIMENTAL): Anlotinib QD po and it should be continued until disease progression or intolerable toxicity or patients withdrawal of consent.Subjects with confirmation of disease progression by independent imaging review, while receiving blinded study drug may request to receive open label Anlotinib and enter the Optional Open Label Anlotinib Treatment Period of the Extension Phase. Subjects who request to receive open label Anlotinib(at the time of confirmed progression) will be informed whether they received placebo or Anlotinib during the period of blinded study drug administration. Subjects who received Anlotinib will not be eligible for the open-label phase.
- Placebo (Type: PLACEBO_COMPARATOR): Placebo QD po and it should be continued until disease progression or intolerable toxicity or patients withdrawal of consent.Subjects with confirmation of disease progression by independent imaging review, while receiving blinded study drug may request to receive open label Anlotinib and enter the Optional Open Label Anlotinib Treatment Period of the Extension Phase. Subjects who request to receive open label Anlotinib(at the time of confirmed progression) will be informed whether they received placebo or Anlotinib during the period of blinded study drug administration.

Based on this trial design, predict the completion outcome and termination type (if applicable).