The shopkeeper always gives people a smile on his face and they are very .
| A．pleasant; pleased | B．pleased; pleased |
| C．pleasant; pleasant | D．pleased; pleasant |
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 |