Life on Mars would be interesting ________ challenging.

A.as well as B.as long as C.as good as D.as soon as

As middle school students, we follow the public rules wherever we go.

A.would B.should C.might D.could

It is 4:30p. m. Ben and Leon _______their work, so they are playing chess now.

A.finish B.were finishing C.have finished D.will finish

—Why are you so sleepy?

—Because I ______to prepare for the English test last night.

A.put up B.went up C.set up D.stayed up

China has successfully prevented the Covid-19 from _______ through the country.

A.spread B.to spread C.spreading D.spreads

Dr. Smith will never leave his parents ________ he is sure both of them are taken good care of.

A.since B.though C.if D.unless

Look at the flowers on both sides of the streets, They_________last month.

A. were planted B. are planted C. are planting D. were planting

_______ exciting news it is! All the Covid-19 patients in Wuhan have returned home.

A.What an B.What C.How D.How an

-I wonder ______．

-I'm not sure，but I hope so．It has been dry for two months．

A.if it will rain tomorrow

B.why it doesn't rain

C.when the rain will stop

D.how long the rain will last

—Amy, your pronunciation is so beautiful now. How do you make it?

—Thanks. Just as the saying goes,”_____.”

A. Each dog has its day B. Many hands make light work

C. Practice makes perfect D. The grass is always greener on the other side