I wondered what great difficulty he had ________ the plan.
| A．to carry out | B．carrying out | C．carried out | D．with carrying out |
The pen I _______ I _______is on my desk, right under my nose.
| A．thought; had lost | B．think; lost | C．think; had lost | D．thought; have lost |
John may come to see me tonight. I can’t go to the movie with youhe visits.
| A．as long as |
B．in order that | C．because | D．in case |
After he retired from office, Rogers _______ painting for a while, but soon lost interest.
| A．saved up | B．took up | C．kept up | D．drew up |
We students got lost in the forest and decided to remain ____we were and waited for the guide
| A．where | B．what | C．how | D．who |
—Oh my god! You__ wear slippers to attend the conference．
—I'm sorry I forgot there is a conference．
| A．must | B．can | C．should | D．shall |