29．-Be careful not to drop the Tang Dynasty vase . -Yes , we can’t be 　　　　.

　　　 A．too careful 　　　　 B．very careful 　　 C．too careless 　　 D．careless enough

28．If you are not yet　　　 　, you are forbidden to visit this site .

　　 A.eighteen years 　B.at age of eighteen 　C.eighteen – year-old 　D.eighteen years of age

27.We must prepare ourselves for the worst　　 we are at a loss when meeting with difficulties .

　　　 A．after 　　　　　　　　 B．before 　　　　　　　 C．as 　　　　　　　　 D．since

26．-You went late __________ the stadium yesterday evening, didn't you？

-Yes, my wife was a little late ________ the supper.

　 A. for; with　 B . for; for　　 C to; with　　 D. at; for

25．I supported him in time , otherwise he 　　　　　off the bike .

　　　 A．might fall　　　 B．would fall 　C．would have fallen 　D．should have fallen

24．His behavior at the party last night seemed rather 　　　　.Many of us were quite surprised .

　　　 A．out of practice 　 B．out of place 　C．out of politeness 　D．out of pity

23.　　　 　happened to be out that day , so you didn’t find me .

　　　 A．It 　　　　　　　　　　　 B．This 　　　　　　　　　 C．You 　　　　　　　　　 D．I

22．On stepping into his room he was astonished to find the floor covered with　　　 　looked like tiny insects .

　　　 A．that 　　　　　　　　　 B．something 　　　　　 C．what 　　　　　　　　 D．anything

21．They have just formed a car pool ,so today it is Mrs Smith’s turn to　　　 　the children from school in the community .

　　　 A．collect 　　　　　　　 B．take 　　　　　　　　　 C．receive 　　　　　　　 D．accept

20．It’s too late to go shopping at this hour ; 　　　　,it’s beginning to rain .

　　　 A．except 　　　　　　　 B．and 　　　　　　 C．besides 　D．but