The workers ___ busily when the boss came to look for something she ___ in the office.
#103985
A
had worked; had left
B
were working; had left
C
working; had left
D
had worked; left
推荐题目
—Did you find the missing couple in the mountain yesterday?—No, but we ________ to get in touch with them ever since.
#104758
A
have tried
B
have been trying
C
had tried
D
had been trying
Although medical science________ control over several dangerous diseases, what worries us is that some of them are returning.
#101311
A
achieved
B
has achieved
C
will achieve
D
had achieved
With the country’s population reaching 1.6 billion in the mid of this century, most of China’s rivers, including the Yellow River, ________.
#102803
A
is drying up
B
will be drying up
C
dry up
D
have dried up
--Have you seen Tony recently? --No, but I ________ dinner with him on Sunday．
#103008
A
would have
B
have had
C
have been having
D
am having
---When did you move to Beijing? ---Last year. But I _____ in a school in Japan for 8 years.
#100774
A
has taught
B
taught
C
has been taught
D
has been teaching