Mr. Green is said _____ an experiment to prove the new method of solving the problem when young.
#98925
A
to do
B
to have done
C
to be doing
D
to have been doing
推荐题目
Professor White has received a letter ___ to give a lecture in Peking University.
#88894
A
to be invited
B
being invited
C
invited
D
inviting him
“Did he repair his bike all by himself that day?” “No, he ___.”
#97776
A
hadn't
B
had had it repairing
C
had it being repairing
D
had Jimmy do it
_________ from other continents for millions of years, Australia has many plants and animals not found in any other country in the world.
#95474
A
Being separated
B
Having separated
C
Having been separated
D
To be separated
Tom asked the candy makers if they could make the chocolate easier ____ into small pieces.
#90560
A
broken
B
to break
C
break
D
breaking