Who wants ________ a doctor.
A. be B. to be C. is
Thursday morning, we visited a farm.
A. On B. In C. At
Liu Tao is _________ younger than his twin brother Liu Xiang.
A. 15 minutes B. 15 years C. 15 days
________ your sister shorter than you ?
A. Is B. Are C. Does
What subject _______ you good _______?
A. are, at B. do, in C. are, in