A. by
B. on
C. in
D. at
19/41 单选题We must ___ no means give up this attempt.()A. byB. onC. inD. at
We must ___ no means give up this attempt.()A. byB. onC. inD. at
(单选题) Will you take the job? We must have a quick __.A. mindB. decisionC. decidi
14.(单选题)When the piston moves up with both intake and exhaust valves closed, we
[单选题]We should not[give up] hope so easily.A.give awayB.abandonC.give inD.give o
16.单选题Which word part means tumor?A. aden/oB. my/oC. cephal/oD. cyt/oE. -omaF. -
15/25 单选题 ___of the money ___ used up.()A. Three-five, areB. Three-fifths, have
31 [单选题] He must have had an accident, or he ( ) thenA. would have been hereB. w
33 [单选题] He must have had an accident, or he ( ) thenA. would have been hereB. w
We must hurry up.The last train ___________ in 10 minutes.( )A. is leavingB. le