Scientists think that there _____ life on Earth for millions of years.
| A．has had | B．have had |
| C．has been | D．have been |
Some scientists have sent a spacecraft to Mars. It ____ several months to get there.
| A．spent | B．has spent |
| C．has taken | D．take |
Do you know thegirl ?
| A．5—years--old | B．5—year—old |
| C．5 years old | D．5—year-- older |
--- Where’s Mary? --- She _____ to Harbin.
| A．has been | B．has gone | C．goes | D．went |
They arrived _____Shanghaia cold morning .
| A．in; in | B．in; at | C．at; on | D．in; on |