_广西成考网

In April, thousands of holidaynmkers remained____abroad due to the volcanic ash cloud.

• A、sticking
  

• B、stuck
  

• C、to be stuck
  

• D、to have stuck

51__________？

We should respect food and think about the people who don’t have____we have here andtreat food nicely.

• A、that

• B、which
  

• C、what
  

• D、whether