With your brother’s help, I’ve made great progress in English and I really want to do something for him ____．
| A．in turn | B．by turns | C．in return | D．in answer |
Tom returned from the manager's office, __________ me that the boss wanted to fire me.
| A．having told | B．tells | C．to tell | D．telling |
__________ the task, they had to stay in the lab for another two hours.
| A．Not completing | B．Not completed |
| C．Not having completed | D．Having not completed |
The storm left, __________ a lot of damage to the city.
| A．cause | B．caused | C．had caused | D．having caused |
With weather __________ fine, we see more and more birds around us.
| A．turns | B．turning | C．is turning | D．to be turning |
—Where shall we go traveling, around China or abroad?
—__________.
| A．It's up to you | B．It's your opinion |
| C．I don't care | D．That's my decision |