21. Perseverance is a kind of quality, and that’s ______ it takes to do anything well.
| A．what | B．that | C．which | D．why |
---What bad luck! I had a cut in salary yesterday.
--- ______. I warned you not to be late and inefficient repeatedly but you ignored it.
| A．You asked for it | B．Never mind |
| C．Take it easy | D．By all means |
In Xinjiang those farmers who ______ move from place to place with their animals in the past have moved into new houses at last.
| A．could | B．might | C．would | D．should |
You can show your love to your mom by giving her flowers that match her personality. Or, if you do not know your mom's ______, carnations could be your best choice.
| A．appetite | B．favorite |
| C．recreation | D．potential |
______ the Malaysia government cares about most is ______ action they are going to take to remove the influence of the disappearance of the Malaysia Airline Flight 370.
| A．That; that | B．What; which |
| C．What; what | D．That; what |
Chinese scientists ______ on Tuesday that they ______ a low-cost welding robot, which can help improve welding efficiency for small factories.
| A．announces; had invented | B．announced; have invented |
| C．announced; had invented | D．announces; have invented |