The classroom must ______.
A: be kept clean
B: keep cleaned
C: kept clean
A: be kept clean
B: keep cleaned
C: kept clean
举一反三
- The medicine （） cool, clean and dry. A: must keep B: must be kept C: must be keep D: must be i
- The classroom needs______. A) clean B) to clean C) to be cleaned D) being cleaned A: clean B: to clean C: to be cleaned D: being cleaned
- The classroom needs _____. A: clean B: to clean C: to be cleaned D: eing cleaned
- The classroom needs______. A: clean B: to clean C: to be cleaned D: being cleaned
- The classroom needs______. A: clean B: to clean C: to be cleaned D: being cleaned