At the party，John made up a joke，________ people burst out laughing.
| A．on which | B．by which | C．at which | D．from which |
We have to work hard; ______ we’ll lose the chance.
| A．therefore | B．otherwise | C．besides | D．however |
We ______ for one hour and a half and it is about time we ______ a rest.
| A．trained; take | B．have trained; took |
| C．are training; will take | D．had trained; to take |
They would not allow him _______ climbing Mount Everest.
| A．to risk to | B．to risk going | C．risking going | D．risk going |
This is a mobile phone. It can be used as a small TV, too.
| A．no more than | B．no less than | C．more than | D．less than |
good and sweet, this kind of pear was soon sold out in the market.
| A．Tasted | B．tasting | C．Having been tasted | D．Being tasted |