Had they known what was coming next, they _________second thoughts.
| A．may have | B．could have |
| C．must have had | D．might have had |
_____________grades you get in this exam, you should never lose heart.
| A．No matter how | B．What | C．No matter what | D．Which |
There are lots of problems in your hometown, but we're happy to see many of them___________.
| A．are solving | B．are solved | C．have solved | D．are being solved |
Everyone is different and that is ________ makes our world so much better.
| A．that | B．which | C．what | D．who |
The rich shouldn't________their wealth. Instead, they should contribute more money to the poor.
| A．show off | B．show up | C．bring in | D．give off |
Try to be independent, for your parents can't do__________for you all your life.
| A．something | B．nothing | C．everything | D．anything |