When the news came the war broke out, he decided, to serve in the army.
| A．since | B．which | C．that | D．because |
After the earthquake, the first thing the local government did was to provide for the homeless families．
| A．accommodation | B．occupation | C．equipment | D．furniture． |
________ this cake, you'll need 2 eggs, 175 g sugar and 175 g flour．
| A．Having made | B．Make | C．To make | D．Making |
Although the causes of cancer ________, we do not yet have any practical way to prevent it．
| A．have uncovered | B．have been uncovering |
| C．are uncovering | D．are being uncovered |
Someone who lacks staying power and perseverance is unlikely to _________ a good researcher．
| A．make | B．turn | C．get | D．grow |
They _________ two free tickets to Canada, otherwise they'd never have been able to afford to go．
| A．had got | B．got | C．have got | D．get |