35. Mr Smith always tries his best to encourage his pupils to ______ the teaching activities.

A. take part　　　　　 B. participate 　　　　　　　 C. participate in　　 D. participate on

34. As she got older, offers of modeling work began to _____ .

A. dry　　　　　　 B. dry up 　　　　　　 C. dry out 　　　　　　 D. dry off

33. Please tell me how the accident _______. I am still in the dark.

　A．came across 　 B．came upon 　　 C．came to 　 D．came about

32. Only _____ according to the directions can the medicine be quite effective.

A. taking　　　　 B. taken　　　　 C. being taken　　　　 D. having been taken

31.She ______ the table and said the dinner was ready.

A. lay 　　　　　 B. laid　　　　　　 C. lied　　　　　　 D. lain