It was backhome after the experiment.

It’s difficult ___thatwe shouldn’t spend all our time ______ our favorite hobby.

George returned after the war, only ________ that his wife had left him.[ ]

Don’t trust such people _____ praise you toyour face but speak ill of you behind your back

Could you tell me if Li Lei____________ to my party, Linda—Sorry, I am not sure. If he ___________, he’ll call you.