40_____
.A.heavy
B.easy
C. hard
D.safe
1.We learn English _______.A.hardestB.hardlyC.harderD.hard
2.左满舵A.Hard-a-starboardB.Hard-a- portC.Port hardD.Full starboard
3.----Hard-a-port! ----Hard-a-port! __________!A.Hard-a-portB.Wheel hard-a-portC.Wheel on hard-a-portD.Yes
4.右满舵A.Hard-a-starboardB.Hard-a-portC.Starboard hardD.Full starboard
第1题:
A. be
B. being
C. is
D. are
第2题:
第3题:
Before she left on the trip, she()hard.
Atrained
Bhas trained
Cwould trained
Dhad trained
第4题:
________________
A. easy B. important C. hard
第5题:
第6题:
NP-hard 问题属于NP