问题

____ the floor, I found his pen lying on the ground.

A:While sweeping
B:While swept
C:If sweeping
D:If swept

正确答案是：

同类题型

The truly homeless are the rich who __ _their home into a hotel hall

Please do me a favor— _____ my friend Stacy to Wanda Cinema at 6:00 tonight.

Is Tom still smoking?— NoBy next Saturday he ____ for a whole month without smoking a single cigarette

This is the best way I could think of ______ him______ computer games.

I go_____to the stadium when there’s a game. But usually I watch it on TV.