We believe ________ we can find out the wonder drugs to H7N9 bird flu.
| A．when | B．whether |
| C．what | D．that |
According to its website, each tattoo lasts around seven days, ________ it isn't scrubbed or picked at.
| A．having provided | B．provided that |
| C．providing that | D．being provided |
—Why didn’t you finish the task? —I didn’t think it is ________ the effort.
| A．worthwhile | B．deserving |
| C．valuable | D．worth |
______ is important now for the Chinese economy is to adapt to the new normal.
| A．What | B．That | C．It | D．As |
We all think that the plan you come up with ____________ the work is very practical.
| A．completing | B．completed |
| C．to complete | D．complete |
They can find whatever they need in the supermarket, ______ is always busy on Sundays.
| A．which | B．when | C．where | D．who |