—What has made him upset recently?
—________ alone to face the troublesome case.
| A．Left | B．Being left |
| C．Having left | D．To leave |
The company is quite honest and guarantees the new product ______ be under warranty for three years.
| A．should | B．shall | C．will | D．can |
—Haven’t seen Lucy recently. What’s happened?
—Oh, it’s more than two months ______ she worked here.
| A．before | B．after | C．since | D．when |
I saw a woman running toward me in the dark. Before I could recognize who she was, she had run back in the direction ______ she had come.
| A．of which | B．from where | C．in which | D．from which |
—Bob! How’s your project? I heard you started it last Friday, right?
—Oh! I ______ for it. But I haven’t decided when to do it.
| A．had prepared | B．was preparing | C．have been preparing | D．have prepared |
The other day he ______ a dollar bill in the suit he was sending to the cleaner’s.
| A．came to | B．came across | C．came into | D．came through |