_______, 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 |
－Ｗhen is your history test?－It is at 2:30_______ Tuesday .
| A．at | B．in | C．on | D．for |
—Do you have a tennis ball? —____________. But Jim has one. Let’s ask Jim for help.
| A．Yes, I don’t | B．Yes, I do |
| C．No, I don’t | D．No, I do |
Look! ___________ are on the bed.
| A．Two pair of trousers | B．A red sweater |
| C．Two pairs of trousers | D．A skirt |
—___________ is the sofa? —It’s $300.
| A．How old | B．What | C．How much | D．How |
—_________. Is this your pen? —Yes, it is.
| A．I am sorry | B．Excuse me |
| C．Hello | D．That’s right |