forlorn（）

单项选择题lacerate（）

A.produce
B.manage
C.control
D.hurt

单项选择题In many cultures，specific events are a（）of adulthood.

A.sign
B.symbol
C.mark
D.signal

单项选择题Which categories of goods are excludable？（）

A.private goods and club goods
B.private goods and common resources
C.public goods and club goods
D.public goods and common resources

单项选择题Domestic oil（）and gasoline prices are two important issues in the presidential campaign.

A.exploration
B.explored
C.exploring
D.explore

单项选择题Vietnam has（）as the world’s third-biggest rice exporter.

A.emerged
B.merged
C.occurred
D.happened

单项选择题Mr.Leach is on holiday and was not（）for comment.

A.amazed
B.available
C.annoyed
D.anticipate

单项选择题（）that dieting is fruitless for people who think that they are too fat，the alternatives are fairly limited.

A.Assuming
B.Assumed
C.Assume
D.Assembled

单项选择题Which of the following involves using the inherent strength of social networks to encourage visitors and fans to share their Likes and comments with friends？（）

A.social density
B.engagement
C.amplification
D.dark social

单项选择题Which of the following is a good definition？（）

A.A party is where you go to have a good time.
B.Democracy is a system of government in which every citizen in the country can vote to elect its government officials.
C.An astronomer is one who studies astronomy.
D.Pollution is the process that chemicals are dumped into rivers.

单项选择题Do you mean to risk（）cold by going out now that it has started pouring with rain？

A.catch
B.to catch
C.catching
D.caught