—The light in the office is still on.
—Oh，I forgot ________.
| A．turning it off | B．turn it off |
| C．to turn it off | D．having turned it off |
— Susan! Shall We go out for a picnic this weekend？
— Oh，with all this work ______, I don’t know if I’ll have time to go out.
| A．to do | B．doing | C．done | D．do |
He was told that it would be at least three more monthshe could recover and return to work.
| A．when | B．before | C．since | D．that |
Forgive him, please. I don’t think he broke your ruler __________.
| A．with care | B．for fun | C．with aim | D．on purpose |
I was reading attentively in my own room ________ suddenly he knocked at the door.
| A．when | B．while | C．then | D．as |
He has five___________ , and they are all doctors working in the same hospital .
| A．sons- in-laws | B．son-in-laws | C．sons-in-law | D．son in laws |