32．_____from lightweight materials，the robots are about the size of a human arm or
smaller．
| A．To build | B．Being built | C．Having built | D．Built |
At our factory there are a few machines similar to _______ described in this magazine.
| A．them |
| B．these |
| C．those |
| D．ones |
The traffic on the main streets has a longer green signal than _______ on the small ones.
| A．one |
| B．this |
| C．that |
| D．it |
—Shall we go for a drink at one o’clock this afternoon?
—_______. Will two o’clock be OK?
| A．Sure, it’s up to you |
| B．Sure, no problem |
| C．Sorry, I can’t make it |
| D．Sorry, I’m not available today |
Because of the financial crisis, days are gone ________ local 5-star hotels charged 6000 yuan.
| A．if |
| B．when |
| C．which |
| D．since |
The meeting ________ a few weeks after he had arrived in America.
| A．occurred |
| B．has happened |
| C．took place |
| D．broke out |