问题

Over the years the European Union has made great efforts to _______ the safety of food and protect the health of its people.

A:discover
B:ensure
C:revise
D:react

正确答案是：

同类题型

Mr Brook didn’t come back at the usual time last night ______, he met some friends and stayed out until midnight

Don’ put off ________ a travel plan. It’s time for us to start.

the difficult maths problem, I have consulted Professor Russell several times.

The man ___ in a shop was sent to the police station.

The best time Wuxi is in spring.—Yes, I think so.