题目内容
选区出正确的答案。
He is not old enough ________(to go, go, going)to school.
The man admitted ________(rob, to rob, robbing)the bank.
People must stop ________(to cut, cutting, cut)down trees.
I'd rather ________(to have, having, have)a cup of coffee.
Mike managed ________(to give, giving, give)up ________(to smoke, smoking, smoke).