— Food problem is becoming a big one in China!
—I think the food ________ before going to shops or supermarkets.
A.is checked | B.is checking | C.should be checked | D.should check |
— Food problem is becoming a big one in China!
—I think the food ________ before going to shops or supermarkets.
A.is checked | B.is checking | C.should be checked | D.should check |