They've made the mistake again, though they _______.
| A．intended to |
| B．didn't intend to |
| C．intended |
| D．didn't intend |
—How long are you staying?
—I don’t know. ______.
| A．That’s ok | B．It depends | C．Never mind | D．It doesn’t matter |
Whatever work you are doing, you should concentrate your attention ______it.
| A．to | B．towards | C．with | D．on |
The incomes of skilled workers went up. _____, unskilled workers saw their earnings fall.
| A．Moreover | B．Therefore | C．Meanwhile | D．Otherwise |
______in a proper way, waste can be turned into useful things.
| A．To deal with | B．Dealt with | C．Dealing with | D．Being dealt with |
It’s helpful to put children in a situation______ they can see themselves differently.
| A．when | B．which | C．that | D．where |