She has visited Hong Kong_______, but she wants to be there a_____ time.
| A．two, three | B．twice, three | C．twice, third | D．two, third |
Only_______ of the students_______ passed the English exam.
| A．three fives; has | B．third fives; has |
| C．three fifth; have | D．three fifths; have |
-We could invite John and Barbara to the Friday night party.
-Yes, _______? I'll give them a call right now.
| A．why not | B．what for | C．why | D．what |
-How much difficulty did you have_______ this problem?
-_______. It's quite easy.
| A．to solve, Nothing | B．solving; None |
| C．to solve, None | D．solving; Nothing |
Yesterday morning I was just leaving_______ the telephone rang.
| A．when | B．while | C．because | D．since |
-When did your computer go wrong?
-Last night, while I_______ some music from a website.
| A．downloaded | B．am downloading |
| C．was downloading | D．have downloaded |