I cannot __________ puzzled, for I simply cannot understand how I could have made such a stupid mistake.
| A．help feel | B．help but to feel |
| C．but to feel | D．but feel |
I was really busy these days, otherwise I _______ to your birthday party last night.
| A．came | B．did come | C．should have come | D．would have come |
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 |