It is these poisonous products _______can cause the symptoms of the flu, such as headache and aching muscles.
| A．who | B．that | C．how | D．what |
—Can I use your phone?
—______.
| A．By any means | B．My pleasure | C．With pleasure | D．Feel free |
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 |