They took rock samples back to Earth for _____study.
A. farther B. step by step C. further D. far away
He went into space as _____polit of Gemini 8.
A. the Command B. a Command C. Command D. Command
Yang Zhenyu ______ physics ever since he studied in Primary school.
A. has become interested in B. became interested in
C.has taken interests in D. was interested in
Perhaps we will live in _________ dome on Mars.
A. a 8-bedrooms B. an 8-bedrooms C. a 8-bedroom D. an 8-bedroom
When something __________me, I often ask my friend for help.
A.worry B.worried C.worries D.worrying
You ________ do the work now. You can do it tomorrow.
A. needn’t to B. don't need C. don’t need to D. need to not
