H．ow many hours of housework did men do every week in the 1970s?

A．About 23.

B．About 26.

C．About 13.

D．About y.

[单选题]H．ow many hours of housework did men do every week in the 1970s?A． About 23. B. About 26.C． About 13. D. About y.

[单选题]A．t the beginning, how did many scientists view Peppeberg's work?A． It would reveal a creature's mind.B． It would probably end in failure.C． It would be hard to judge its value.D． It would be a long-term project.

[单选题]23． How many hours of sleep is good for students' health?A． Less than 9 hours．B． Over 9 hours．C． Only 9 hours．D． 7 hours．

[单选题]H．OW many times did the clock__________?A．hitB．knockC．beatD．strike

[单选题]D．o scientists know how many cryptic species exist?A．Not yet.B．Yes, they do.C．They will know the answer in another one or two years.D．They will never know the answer.

[单选题]30． How many coins did Jim dig out from the garden?A．Five．B．Many coins．C． No coin at all．D．Only one．

[单选题]How many students do you teach?- _________A.Quite a bit.B.More boys than gi

[单选题]H．ow did the calf feel about the mother elephant’s roaring?A．It was a great comfort.B．It was a sign of danger.C．It was a call for help.D．It Was a musical note.

[单选题]H．ow did the calf feel about the mother elephant’s roaring?A．It was a great comfort.B．It was a siga of danger.C．It was a call for help.D．It was a musical note.

[单选题]H．ow did the calf feel about the mother elephant’s roaring?A． It was a great comfort. B. It was a sign of danger.C． It was a call for help. D. It was a musical note.