19、I ________ be slow, but at least I don't make stupid mistakes.

A．must             B．need             C．should              D．may   

18、The company provides cheap Internet access. _______, it makes shareware freely available.

A．In addition           B．In brief           C．In return             D．In common

17、We went to Mountain Tai last weekend, ________, not surprisingly, was crowded with visitors.

A．that           B．which            C．where               D．when

16、I used to go camping a lot, so it won’t be the first time I          in a tent.

A．have slept         B．had slept　           C．was sleeping          D．slept

15、______ I enjoy the book with some nice pictures, I don’t have enough money to buy it.

A．Since          B．While             C．As            D．If

14、The        of surfing the Internet is how you can tell whether the information is true or not.

A．ability         B．competition           C．challenge             D．knowledge

13、With the effects of global warming, trees          their leaves much later in the year.

A．are losing         B．have lost             C．lost           D．were losing

12、The government has         plenty of food and clothes of high quality to the people in Wenchuan.

A．suffered          B．arranged           C．adjusted            D．supplied

11、What China can learn from         2008 financial storm has become        hot topic among us.

A．the; /          B．the; a             C．/; the            D．/; a

10、To her disappointment, what she had devoted herself to _______ in nothing but failure.

A．resulting              B．results              C．has resulted                 D．resulted