---How is it that you are late for class again?
---_______.
| A．By bus and then on foot | B．Because I missed the bus |
| C．It’s quite all right | D．It’s far from school |
It is thought that one billion people I the world, ______is half the word’s workers, earn their living by farming.
| A．if | B．that | C．which | D．what |
—Hold the ladder for me!
—That’s______
I think I was at school,______I was staying with a friend during the vacation when I heard the news.
| A．even so | B．and then |
| C．so that | D．or else |
There were two boys in the lab,______did the experiment successfully.
| A．the clever of whom |
| B．the cleverer or whom |
| C．the clever of them |
| D．the more clever of them |
After the new technique was introduced the factory produced cars in 1994 as the year before.
| A．as twice many | B．as many twice |
| C．twice as many | D．twice as |