It’s necessary for you _____ exercise every day.
| A．taking | B．to take |
| C．take | D．takes |
A. total B. top C. notice
The full moon often makes her _________ her hometown.
A. missing B. to miss C. miss
All the students in my class can’t ______ the math problem. It’s too difficult for us.
A. work on B. work out C. work for
My father was watching TV ______ my mother was cooking.
A. while B. until C. when
She will call you if she ____.
A. goes to B. come back C. comes back