—Are you going to Tom’s birthday party?
—________.I might have to work.
| A．It depends | B．Thank you |
| C．Sounds great | D．Don’t mention it |
29．Although going to school_________most of their time, students in the country always help the parents with the house-work.
| A．takes up | B．makes up | C．uses up | D．saves up |
28．---How did the interview go?
---Quiet well. Not so smoothly as I expected,________.
| A．instead | B．either | C．though | D．as well |
27．---Mary, you didn’t show up at the meeting last week?
---No, I________, but my son had a sudden fever and I had to stay at home to take care of him.
| A．didn’t | B．was going to | C．had to | D．wouldn’t |
26．Newly-developed materials for spaceships can______extreme weather conditions.
| A．hold | B．support | C．stand | D．carry |
25．James Williams is my favorite professor; his speech is always brief, clear and_____the point.
| A．to | B．on | C．at | D．Of |