When something __________me, I often ask my friend for help.

A.worry    B.worried    C.worries    D.worrying

Perhaps we will live in _________ dome on Mars.

A. a 8-bedrooms     B. an 8-bedrooms   C. a 8-bedroom    D. an 8-bedroom

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

He went into space as _____polit of Gemini 8.

A. the Command   B. a Command              C. Command      D. Command

They took rock samples back to Earth for _____study.

A. farther         B. step by step          C. further         D. far away

Neil Armstrong is the first man         .

A.walk on the moon   B.walk on moon  C.to walk on the moon   D.to walk on moon

He worked          an artist for 10 years.

A./          B.like            C.as              D.about

Bruce          an astronaut last year.

A. is selected to become B.was selected to as

C.is selected to as  D.was selected to become

That is the cook ______ came from London.

A. that      B. which      C. /      D. Who

Mother Teresa devoted her life _______ caring _____ the poor.

A. for, to     B. for, for     C. to, for     D. to, to