—Dad, when shall we go to visit my grandpa?
—Grandpa is very busy at present．We'll go to see him whenever __________.
| A．he is convenient | B．he will be convenient |
| C．it is convenient to him | D．it will be convenient to him |
I am sorry you’ve been waiting so long, but it will still be some time __________ Brain gets back from his holiday.
| A．since | B．before | C．till | D．after |
— Can you explain ____ you have been late for school several times this term?
— Sorry, but it is the first time that I have been late this week.
| A．why is it that | B．how it is that | C．why it is that | D．how is it that |
________ of you figures out the answer will be given a pack of candies weighting 2 pounds as a gift.
| A．Anyone | B．Whoever | C．Those | D．Who |
After _________ all the difficulties, he has developed a habit of facing everything bravely, and is now living a simple but full life.
| A．looking through | B．going through | C．looking up | D．going up |
President Hu Jintao urged every effort ________ to rescue and treat the injured German tourists in a traffic accident in Tianjin on the morning of Oct1, 2012.
| A．is made | B．must be made | C．be made | D．should make |