—I’m afraid I have to leave for Miami tomorrow.
—___________
| A．I’m afraid not. | B．Have a good journey. |
| C．Please do. | D．Can’t you stay a bit longer? |
The companies are working together to create they hope will be the best means of transport in the 21st century.
| A．which | B．that | C．what | D．Who |
We should consider the students’ request the school library provide more books on popular science.
| A．that | B．when | C．which | D．where |
—Is there any possibility you could pick me up at the airport ?
—No problem
| A．when | B．that | C．whether | D．what |
The how to book can be of help to wants to do the job.
| A．who | B．whomever | C．no matter who | D．whoever |
The fact has worried many scientists ______ the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．though |