31. --Why did you go back to the shop?　　　 --I left my friend ____there．(wait)

waiting

30. Mr. Smith，____of the ____speech, started to read a novel．(tire；bore)

tired；boring

29. An army spokesman stressed that all the soldiers had been ordered ____ clear warnings before firing any shots．(issue)

to issue　

28. The discovery of new evidence led to the thief ____．(catch)

being caught

27. ____time，he’11 make a first-class tennis player．(give)

Given

26. The teacher asked us ____so much noise．(not make)

not to make

25. A cook will be immediately fired if he is found ____in the kitchen．(smoke)

smoking

24. After his journey form abroad，Richard Johns returned home，____．(exhaust)

exhausted

23. The pilot asked all the passengers on board to remain ____as the plane was making a landing．(seat)

seated

22. He looked around and caught a man ____his hand into the pocket of a passenger．(put)

putting