— What were you doing when we were playing basketball yesterday afternoon?
— I ______ the classroom.
| A．was cleaning | B．have cleaned |
| C．will clean | D．clean |
She’s not strong enough _________ walking up mountains.
| A．to go | B．going | C．go | D．went |
--Pauline has lost her phone. –No. It’s in her bag. I _________ hear it.
| A．must | B．can | C．may | D．shall |
Sally took a photo of her friends while they _________ computer games.
| A．play | B．are playing | C．have played | D．were playing |
This morning I _________ some new restaurants on the Internet for I wanted to take Mia to a nice restaurant for her birthday.
| A．picked up | B．looked up | C．cleaned up | D．gave up |
I think he’s been drinking, _________ I’m not completely sure.
| A．if | B．though | C．until | D．as |