– Who didn’t turn off the light after school yesterday?
– It ______ be Lucy. She told me she was the last one to leave the classroom.
| A．must | B．mustn't | C．might | D．can't |
—You should ________ your son. He works harder than before.
—Thanks, I will.
| A．praise | B．punish | C．prevent | D．beg |
She's not strong enough walking up mountains.
| A．to go | B．going | C．go | D．went |
Sally took a photo of her friends while they computer games.
| A．play | B．are playing | C．have played | D．were playing |
It's much to have a small lovely room than a big cold one.
| A．good | B．well | C．better | D．best |
I don't remember the book yesterday.
| A．where I put | B．where did I put |
| C．where will I put | D．where I will put |