，when Marx was already ，he began to learn Russian.
A.In 1870s； in his fifties
B.In 1870s； in fifties
C.In the 1870s； in his fifties
D.In the 1870s； in fifties
—It is a pity that the disease is terrible at present.
—Yes. It will be worse ________ we take action to do something for it.
A.if B.unless C.until D.when
I found cooking________ great fun. ________ fantastic time we had cooking all kinds of delicious food during the long winter holiday!
A.so, What a B.such, How C.so a, What D.such, What a
Progress suggests a person’s ability to change the way he is living at the moment and it must ______ a better life and a better way of doing things.
A.lead to B.devote to C.make up D.take up
Blue clothes look nice________ Sandy as she looks good ________ blue.
A.on; on B.in; in C.in; on D.on; in
—Can children under the age of 12 ride bicycles in your city? —No, according to the law, they ________.
A.shouldn’t B.mustn’t C.needn’t D.may not
