The theory of black holes in space__ (accept) by many serious scientists and astronomers.
Idon’tneedanyhelpatthemoment,butI_____youroffer
A、appreciate
B、admire
C、enjoy
D、like
Hismotherbecomesdisappointedwheneverhefailstoliveuptoher________(expect)
Expertshavefoundthatnormalsleepcanbedividedintofive______stages
A、moderate
B、initial
C、distinct
D、advanced
Many other new techniques are now available that enable more research___ (do) in the test tube to see if chemicals produce harmful biological effects.