After the quarrel, I tried all my best to fix the misunderstanding between us, but all my efforts seemed _____.
| A．in trouble | B．in case | C．in effect | D．in vain |
I can’t help _______the house because I’m busy making a cake.
| A．to clean | B．cleaning | C．cleaned | D．being cleaned |
People couldn’t help _____the funny villager.
| A．laugh at | B．to laugh at | C．laughing at | D．laughing on |
She reached the top of the hill and stopped _____on a big rock by the side of the path.
| A．to have rested | B．resting | C．to rest | D．rest |
I can’t imagine _____that with such a famous author.
| A．work | B．to work | C．to be working | D．working |
She pretended ________the letter I wrote the day before yesterday.
| A．not to receive | B．not receiving | C．not to hear from | D．having not received |