It was with great joy _______ he worked out the problem that he had long been puzzled about.
A．which B．that C．because D．since
The manager is always very _______ for appointments, which earns him a good reputation.
A．punctual B．numb C．allergic D．content
_______ this sentence a second time, the meaning will become clear to you.
A．If reading B．When you read C．Reading D．Read
Global warming is a big _______ for all and it’s important to raise awareness about climate change.
A．reward B．concern C．evolution D．boom
— You _______ for me this morning. I came over here with Michael in his car.
— Well, why didn’t you let me know earlier?
A．should have waited B．would have waited
C．couldn’t have waited D．needn’t have waited
— Does your father like going to movies?
— Not really. He seldom, _______, visits the cinema.
A．in addition B．when necessary C．if ever D．above all
