The Sanlu Milk Powder event is a clear indication that food safety is a big problem; nobody can ___ all foods are secure to us, but we are sure that the situation is turning for the better.
A.acknowledge | B.guarantee | C.identity | D.clarify |
If you______the right map , we wouldn’t have got lost.
A.have bought | B.bought | C.had bought | D.would buy |
—Which umbrella can I take?
—You can take______of them; I will use none.
A.both | B.any | C.either | D.each |
Living in the desert involves a lot of problems,______water shortage is the worst.
A.of which | B.when | C.of whose | D.Which |
Only when you have obtained enough data______ come to a sound conclusion.
A.can you | B.you can | C.would you | D.you would |
Lessons______easily are soon forgotten.
A.1earn | B.learned | C.to learn | D.learning |