It has been a long time for human to make _____ to reach the moon.
| A．its easy | B．it’s possible | C．it truth | D．it possible |
Everyone has periods in their lives ______ everything seems very hard.
| A．when | B．where | C．which | D．that |
I can’t thank you ______ much because without your help I ______ have won the first prize.
| A．too; wouldn’t | B．very; shouldn’t | C．that; might not | D．so; couldn’t |
The big city has always been the dream career destination of college students. But of late a trend of heading back home ________a part of future job considerations.
| A．has become | B．had become | C．becomes | D．will become |
A severe drought over the past months has left 7.5 million people without ________ drinking water in two southwestern Chinese provinces.
| A．frequent | B．private | C．permanent | D．adequate |
Stronger and more lasting memories are likely to be formed ________a person is relaxed.
| A．where | B．unless | C．when | D．although |