Having lived in China for 8 years, Helen has a good ______ of both English and Chinese．
| A．program | B．guidance | C．command | D．ability |
Agriculture officials this week said strict control pressures are in place,___to prevent the red fire ants spreading across the country.
| A．intended | B．intending | C．to be intended | D．having intended |
—The police have caught the murderer.
—Yes, and he admitted ________ his boss on a rainy night seven years ago.
| A．to kill | B．to have killed | C．having killed | D．have been killing |
__________ you promise to come to help me,I don’t mind what time tomorrow you arrive at my place.
| A．So long as | B．So far as | C．As good as | D．As well as |
It matters little _______ a man dies, but ______ matters much is ________ he lives.
| A．how; what; how | B．how; it; how | C．why; it; why | D．that; what; that |
For weeks, the street hasn’t been cleaned by the cleaners, _______makes it very dirty.
| A．who | B．which | C．that | D．this |