甲状腺肿是因为缺乏以下哪项而致

If we have given you any cause() dissatisfied , we shou...

单项选择题If we have given you any cause() dissatisfied , we should be glad to know of it .
A. to be
B. of
C. for
D. to

We are ready to()a leasing agreement for 10 photocopies...

单项选择题We are ready to()a leasing agreement for 10 photocopies.
A. enter into
B. signing
C. agree to
D. engage

We think we can promise that the building will be ready...

单项选择题We think we can promise that the building will be ready()the end of August .
A. by
B. for
C. to
D. towards