--- How messy it is! Kevin, can I come in?
--- Oh, I'm so sorry. The house____.
| A．is being cleaned | B．has been cleaned |
| C．is cleaning | D．was cleaned |
Not until he retired from teaching three years ago _______having a holiday abroad .
| A．he had considered | B．had he considered | C．he considered | D．did he consider |
_______hard you try, it is difficult to lose weight without cutting down the amount you eat .
| A．However | B．Whatever | C．Whichever | D．Whenever |
A lot of language learning ,_______has been discovered, is happening in the first year of life, so parents should talk much to their children during that period .
| A．as | B．it | C．which | D．this |
That Jill was worried seemed _____ to everyone present at the meeting.
| A．constant | B．evident | C．previous | D．rough |
Having finished her project ,she was invited by the school______ to the new students.
| A．speaking | B．having spoken | C．to speak | D．to have spoken |