The medicine works more effectively _______ you drink some hot water after taking it.
| A．as | B．until | C．although | D．if |
I dislike _______ when others laugh at me in publicorthink poorly of me behind.
| A．that | B．those |
| C．it | D．them |
Everyone knows that _______ is dangerous to play with fire, but _______ is difficult is to prevent children from playing with fire.
| A．it, it | B．what, what |
| C．it, what | D．what, it |
. ------Don’t put the waste on the ground.
------Oh, I’m very sorry. I ____ the dustbin there.
| A．don’t see | B．isn’t seeing | C．didn’t see | D．haven’t seen |
------When can I see you, Mr Black? Three o’clock this afternoon?
------Oh, no. I _____ a meeting then.
| A．will have | B．will be having | C．am having | D．have |
You have to wait till tomorrow when our manager ____ back.
| A．will come | B．comes | C．came | D．come |