They decided to leave the waiter a big _____ because the food and service had been excellent.
| A．note | B．reward | C．tip | D．gift |
In April，thousands of holidaymakers remained________abroad due to the volcanic ash cloud.
| A．sticking | B．stuck |
| C．to be stuck | D．to have stuck |
“Things________never come again！” I couldn’t help talking to myself.
| A．lost | B．losing |
| C．to lose | D．have lost |
Every one of us must know：________we live can we save the earth.
| A．by changing the way only |
| B．only by changing the way |
| C．by only changing the way |
| D．by changing only the way |
—Can those________at the back of the classroom hear me?
—No problem.
| A．seat | B．sit |
| C．seated | D．sat |
Attracting _____ senior citizens, Florida is _____ home to the largest population of elder Americans.
| A．不填; 不填 | B．the; the | C．the; 不填 | D．不填; a |