The study suggests that it is more difficult to respond what to get rid of.
举一反三
- Such vermin as bugs and rats （is, are ）hard to get rid of.
- Once , bad habits are hard to get rid of. A: form B: formed C: forming D: got
- College study is more difficult than high school study because you have to learn by yourself sometimes.
- A new study suggests that contrary to most ________ (以前的) surveys, people are actually more stressed at home than at work.
- ________to get rid of waste ___a big problem for the human beings today. A: How; is B: What; is C: What; are D: How; are