27、Our teacher looked here and there on our playground ______ looking for something.

A．even though          B．even if          C．as if               D．only if

26、Going on a trip into ______ space must be quite ______ exciting experience.

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

25、It is bad ______ to talk with your finger ______ at the other person.

A．manners; to point                                 B．manner, to point

C．manners, pointing                                D．manner, points

24、______ Mary found her lost pen the day before yesterday?

A．Where do you think it was that                     B．Do you think where it was that

C．Do you think it was where that                           D．Where you think it was that

23、How did it come about that you failed to ______ in time for the meeting yesterday?

A．turn down       B．turn over         C．turn off             D．turn up

22、The girl ______ on the ground ______ to me that she had ______ the purse on the desk.

A．lay; lying; lied                                            B．lied; lied; lied

C．laid; laid; laid                                      D．lying; lied; laid

21、Henry was _____ struggling at sea by a British ship, _____ he was able to survive the accident.

A．spotted; and thus                                        B．discovered; thus

C．founded; so                                                    D．seen; thus

20、Every means ______ prevent the water from ______.

A．are used to; polluting                                  B．is used to; polluting

C．is used to; polluted                                     D．is used to; being polluted

19、He is the first person you can think of ______, for he is always willing to ______ is in trouble.

A．relying on; figure out who                           B．relying on; help out whomever

C．to rely on; help out whoever                        D．to rely on; make out no matter who

18、______ it will do us harm or good remains ______.

A．If; to be seen                       B．Whether; to be seen

C．That; seeing                       D．Whether; seen