---When _______ your computer ___________?
---Yesterday afternoon.
| A．did ; repair | B．did ; repaired | C．was ;repaired | D．has ;repaired |
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 |
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 |