He dived in the water and _____ to search for his girlfriend’s lost gold ring.

Queen Elizabeth Ⅱ is often thought to be the richest woman in the world.________，her personal wealth seems rather small.                             (2012·安徽，34)

If we leave right away，________ we’ll arrive on time.              (2013·浙江，6)

．Walking alone in the dark，the boy whistled to ________ his courage.

Michelle found a job as a high school teacher which ________ spending quite a lot of time with students.                                                        (2013·福建，24)

If you are in trouble，Mike is always willing to________a hand.           (2013·天津，2)

—What do you think of the story in today's newspaper?
—We shouldn't ________ the trouble of helping others only because what we do may invite trouble.

Though the “No smoking” signs have existed for long in public places, heavy smokers often ________ them and light up cigarettes.

We really hope the sunny weather ________ for Saturday's tennis match.

Many teens don't get enough sleep because they have too much homework to do, which ________ them up at night.