—How much are the two pairs of shoes?
—They are not expensive. I think fifty dollars ______ enough.
| A．is | B．are | C．were | D．was |
"How much money did you_________ in fixing your watch?" "About ten yuan. "
A. cost B. pay C. spend
When you leave the reading room, you should remember to _____ the lights.
A. turn onB. turn down C. turn off
"_________do you play the piano?" "Twice a week. "
A. How far B. How often C. How long
If my father_________ back, please let me know.
A. comes B. will come C. come
"Whose notebook is this?" "It ____ Jim's. It has his name on it."
A. can't be B. can be C. must be