Is it necessary for you to pass the strict drivingtest first

______________ twice a year，whether it is a car，a bus or a truck，is the rule that every driver must obey in this city．

You’d better practice more and play better if you wantto make a good ______ on the audience at the concerts.

He has been working so hard _____ he could answer such a difficult question[ ]

________ of us think the English examination was difficult.But I still don’t think ________ could pass it.