_______, when Marx was already _______, he found it was important to study the situation in Russia, so he began to learn Russian.
| A．In 1870s, in his fifties |
| B．In 1870s, in fifties |
| C．In the 1870s, in fifties |
| D．In the 1870s, in his fifties |
We should buy things ____ locally.
| A．producing | B．are producing | C．are produced | D．produced |
It’s impossible ____ a taxi on such a rainy day.
| A．for getting | B．of get | C．to get | D．to getting |
____ to the meeting on time tomorrow. It’s very important.
| A．Don’t come | B．Do come | C．Not come | D．Coming |
It’s hopeless to finish the work today, ____?
| A．isn’t it | B．is it | C．doesn’t it | D．does it |
It’s better to teach a man fishing than ____ a man fish.
| A．giving | B．to give | C．give | D．gave |