________ we've set our mind on the goal, we must go through with the task.
| A．As long as | B．Even if |
| C．Now that | D．If only |
John is very ——if he promises to do something he’ll do it .
| A．independent | B．confident | C．reliable | D．flexible |
The good thing about children is that they very easily to new envionments.
| A．adapt | B．appeal | C．attattch | D．apply |
It took building supplies to contruct these energy—house . It took brains , too .
| A．other than | B．more than | C．rather than | D．less than |
Over the past decades , sea ice in the Arctic as a result of global warming .
| A．had decreased | B．decreased | C．has been decreasing | D．is decreasing . |
The medicine works more effectively you drink some hot water after taking it .
| A．as | B．until | C．although | D．if |