—Lily is going to make a presentation in class this afternoon.
—Oh, really? I ________ it was Michael's turn.
| A．think | B．have thought |
| C．thought | D．am thinking |
We’ve made up our mind to finish this experiment no matter ___ difficult it was.
| A．what | B．when | C．how | D．how much |
His doctor suggested he ___ smoke because of his illness.
| A．wouldn’t | B．didn't | C．wasn’t | D．not |
---It’s a wonderful party.—It’s very nice of you to come.___.
| A．Please do make yourself at home | B．Please enjoy yourself |
| C．Help yourself | D．Have a good time |
He ___ at the enemy, without saying a word.
| A．shouted | B．stared | C．called | D．arrived |
She didn't answer the phone.She ___ be asleep.
| A．couldn't | B．mustn’t | C．might | D．had to |