_____ in the queue for an hour,Tom suddenly realized that he had left his wallet at home.
| A．To wait | B．Have waited | C．Having waited | D．To have waited |
We are going to spend the Spring Festival in Canada this year, ______live my grandparents and some relatives．
| A．where | B．which | C．who | D．that |
As teenagers, sometimes we do need our parents’ guidance, especially______ social experiences．
| A．by way of | B．as a result of |
| C．in place of | D．in terms of |
What would have happened, ___________, as far as the river bank?
| A．Bob had walked farther |
| B．if Bob should walked farther |
| C．had Bob walked farther |
| D．if Bob walked farther |
________ on their last legs, the enemies still thought they were unconquerable．
| A．As though | B．Even though |
| C．In case | D．As soon as |
________ for a long time, but he tried his best to make up for what he missed．
| A．Being ill staying in hospital |
| B．Having been ill staying in hospital |
| C．He was ill staying in hospital |
| D．To be ill staying in hospital |