John thinks it won’t be long he is ready for his new job. ( )
A. when
B. after
C. before
D. since
第1题:
Scientists say it may be five or ten years _____ it is possible to test this medicine on human patients.
(A) since (C) after
(B) before (D) when
选B
之前
科学家说这个药想在病人身上试验,还要等个5到10年。。。
第2题:
49________.
A.couldn’t
B.mustn’t
C.needn’t
D.won’t
第3题:
第4题:
John's score on the test is the highest in his class, he ______ very hard.
A. must have studied
B. should have studied
C. must study
D. should study
第5题:
You are signing on a deck officer,who will be designated as one of the GMDSS operators,before sailing foreign.Which statement is TRUE ________.
A.He/she must have an STCW certificate endorsed as“Valid for Service on Vessels Operating in the GMDSS System”
B.He/she must present either an FCC-issued license or a Coast Guard-issued license
C.You must consult the“List of Qualifications”on the reverse of his/her FCC-issued license
D.His/her Merchant Mariners Document must have an added endorsement as “Radio Electronics Officer”
第6题: