They will lose the game _________they try their best.
A.unless B.if C.until
---__________do you exercise?
---Every day.
A.When B.How often C.How long
The new dining hall ________two years ago.
A.is building B.is built C.was built
Look! Many people _______under the big tree.
A.is standing B.are standing C.standing
I found ________ easy to get on with the twins.
A.that B.this C.it
--Mum,must I finish my homework now?
--No,you ________. You can finish it this afternoon.
A.mustn’t B.needn’t C.must
