Last night, there were millions of people _______ the opening ceremony live on TV．
| A．watch | B．to watch |
| C．watched | D．watching |
—What were you doing when Tony phoned you?
—I had just finished my work and________ to take a shower.
| A．had started | B．started |
| C．have started | D．was starting |
—I hear Jane has gone to the Holy Island for her holiday.
—Oh, how nice! Do you know when she ________?
| A．was leaving | B．had left |
| C．has left | D．left |
Turn on the television or open a magazine and you ________ advertisements showing happy families.
| A．will often see | B．often see |
| C．are often seeing | D．have often seen |
. Sales of CDs have greatly increased since the early 1990s, when people ________ to enjoy the advantages of this new technology.
| A．begin | B．began | C．have begun | D．had begun |
The city is built _____ two rivers come together.
| A．in which | B．which | C．where | D．that |