The Somali robbers' frequent attacks on the sea urged the United Nations to __________ all nations to take immediate action.
| A．fight for |
| B．apply for |
| C．call on |
| D．wait on |
Not until he retired from teaching three years ago___having a holiday abroad
| A．he had considered |
| B．had he considered |
| C．he considered |
| D．did he consider |
—Look at those clouds!
—Don’t worry.___it rains,we’ll still have a great time
| A．Even if |
| B．As though |
| C．In case |
| D．If only |
You can borrow my car___you promise not to drive too fast
| A．unless |
| B．even if |
| C．in case |
| D．as long as |
All the photographs in this book,___stated otherwise,date from the 1950s
| A．unless |
| B．until |
| C．once |
| D．if |
Hot___the night air was,we slept deeply because we so tired after the long journey
| A．although |
| B．as |
| C．while |
| D．however |