_______Wale_______at school，he would gain much higher a salary.

— Thank God! The accident was avoided after all.—That was lucky, but ten inches nearer the two cars _________?

The space suits can be adjusted so that the team can reproduce different levels of gravity as if they________in space.

Liza ___ well not want to go on the trip --- she hates traveling.

---Someone’s been here. Who ___ it be? It looks like Helen.---It ___ be Helen.She is ill in hospital.