I’m not good at Maths, so I don’t know _________ out this difficult Maths problem.
| A．when to work | B．who to work |
| C．what to work | D．how to work |
He’s given an important report on the work of the government，________?
| A．isn’t he | B．is he | C．hasn’t he | D．has he |
—Sandy，can you tell me ________?
—Sorry，I’ve no idea．
| A．how many guests have been here | B．when is the party |
| C．why did they come | D．where will they leave |
I don’t know the teacher ________ is talking with Miss Wang．
| A．what | B．whom | C．which | D．who |
If I find his phone number，I ________ you．
| A．tell | B．told | C．will tell | D．have told |
People often go skating in ________ winter．
| A．/ | B．a | C．an | D．the |