I could hardly tell the twins apart because their appearances are only ____ different.
| A．slightly | B．gradually | C．personally | D．extremely |
I have no idea what life would be like without water. The underlined part means “_________”.
| A．don’t remember | B．don’t know | C．don’t believe | D．don’t expect |
The lady_________dancing as a hobby in her sixties, and she is really good at it now.
| A．dressed up | B．looked up | C．took up | D．put up |
Though I_________the phone number many times, the foreigner couldn’t write it down.
| A．repeated | B．refused | C．researched | D．recognized |
Edward, you have grown up. You should learn to make your own room_________.
| A．empty | B．noisy | C．dirty | D．tidy |
These natural disasters have warned us that everyone should start to protect the_________ immediately.
| A．amusement | B．development | C．environment | D．government |