The scientist, who space all his life, is retiring next week.
| A．had explored |
| B．is exploring |
| C．has been exploring |
| D．explored |
_______ in a heavy traffic jam is quite an unpleasant experience.
| A．Caught | B．Having caught | C．Being caught | D．To catch |
They started off late and got to the airport with minutes to _______.
| A．spare | B．catch | C．leave | D．make |
If the horse won today, it _______ 30 races in five years.
| A．would have won | B．must have won |
| C．won | D．has won |
He hasn’t slept at all for three days. _______ he is tired out.
| A．There is no point | B．There is no need |
| C．It is no wonder | D．It is no way |
— Do you have any idea what Paul does all day?
— As I know, he spends at least as much time playing as he _______.
| A．writes | B．does writing | C．is writing | D．does write |