Mr. Smith found that gas from the pipe when he came back because we forgot to switch off. But at last we were lucky to escape .
—I failed again. I wish I ____ harder. ---But you ____.
While there are quite a few differences in the education system, in many countries education is ____.
Some plants are vey ____ to light; they prefer the shade.
—Can those ____ at the back of the classroom hear me? ---No problem.
—Can I pay the bill by check? --- Sorry, sir. But it is the management rules of our hotel that payment ____ be made in cash.