John ______ in his room when he heard screaming.
A.is studying | B.studied | C.was studying | D.has studied |
He missed _______ when he was in Africa.
A.killing | B.to be killed | C.to kill | D.being killed |
In our town, wood can ___________ a fire.
A.be used to make | B.be used to making |
C.use to make | D.used to making |
In the past five years China ________ great _________.
A.made, progress | B.has made, progresses |
C.made, progresses | D.has made, progress |
They talked for about an hour of things and persons _____ they remembered in the school.
A.which | B.that | C.who | D.whom |
Don’t be in a hurry. We are supposed ____________ this problem step by step.
A.solving | B.to solving | C.to solve | D.solve |