What would have happened, ______, as far as the river bank?
| A．Edward Snowden had walked farther |
| B．if Edward Snowden should walk farther |
| C．had Edward Snowden walked farther |
| D．if Edward Snowden walked farther |
Do you __ your son to be a doctor?
| A．hope | B．think | C．expect | D．look forward to |
All passengers ___ to show their tickets next time.
| A．require | B．will require | C．are required | D．are to require |
He placed one of the arrows __ his bow.
| A．in | B．on | C．at | D．against |
___ from a plane, the Great Wall looks like a huge dragon.
| A．Seeing | B．Seen | C．To see | D．Look out |
Africa is actually connected with Asia at the spot ___ the Suez Canel was dug.
| A．when | B．where | C．which | D．and |