He was puzzled by this phenomenon. He began to try every approach _________ the best way of working it out.
#96968
A
known to find
B
knowing to find
C
known finding
D
knowing finding
推荐题目
. Enough attention should be paid to _____ your pronunciation and intonation.
#97051
A
improve
B
improving
C
improved
D
be improve
The old woman had a letter from her son in the army_____ to her.
#98411
A
read
B
write
C
written
D
received
With his mother_______ him, he is getting on well with his work.
#95469
A
helping
B
to help
C
help
D
helped
To their great relief, the missing child returned home, ______, after an absence of two weeks.
#95964
A
looked tired and healthy
B
tired and healthy
C
tiredly and healthily
D
looking tired and healthily
Days of snowstorms have left the city under thick layers of ice and some 50,000 homes without power．
#88623
A
to be trapped
B
trapped
C
having trapped
D
being trapped