（） driving to work, Mr. Lead usually goes to his office downtown by train.

Nobody could （） a satisfactory explanation of the accid...

单项选择题Nobody could （） a satisfactory explanation of the accident.

We have to get that car fixed （）.A．no matter it costs h...

单项选择题We have to get that car fixed （）.

When I was a child, I used （） to the river and bathe in...

单项选择题When I was a child, I used （） to the river and bathe in the evening.