．We are taught that a business letter should be written in a formal style ____ in a personal one．
| A．less than | B．other than | C．better than | D．rather than |
he will come is still a question.
| A．Whether | B．If | C．That | D．Who |
He often makes his sister .
| A．cry | B．to cry | C．crying | D．cried |
I want to buy is a book.
| A．How | B．What | C．That | D．Who |
Either you or Igoing to the teacher’s office after class.
| A．are | B．is | C．am | D．will |
Travelling a good way to learn about the world.
| A．is | B．are | C．have | D．has |