单选题：____ at a decision, they immediately set to work. [ ]A. Ar..

Examples of people____ by lightning more than five times are almost common. [ ]A. strikingB. to be struck C. being struckD. struck

He asked who was the man ____ on. [ ]A. to be operating B. operating C. to operate D. being operated

The old man, ____________ abroad for twenty years,is on the way back to his motherland[ ]A.towork B.working C.tohaveworked D.havingworked

The boy _____ on the bed _____ to his friend that a cock laid an egg yesterday.[ ]A. lay；lay B. lying；layC. lying；liedD. lied；lying

More highways have been built in China, ________ it much easier for people to travel from one place to another. [ ] A. makingB. madeC. to makeD. having made