Sometimes new ideas have to be tested many times before ______ .
举一反三
- Sometimes new ideas have to be tested many times before ______ . A: A.accepting fully B: B.being fully accepted C: C.fully accepting D: D.fully being accepted
- A new theory ______ before it can be put into practice. A: must be tested B: be tested C: can be tested D: to be tested
- Genetically engineered crops are sometimes released into the environment before they have been _________. A: slip by undiscovered B: health effects C: adequately tested D: public relations exercise
- You will have to practice ______ times before you can do it. A: many more B: more often C: more many D: more several
- Many times, a Chinese person will refuse a gift two or times before finally accepting it.