While in college, Mak never minded ________ extra work for his class.
#53027
A
to do
B
doing
C
do
D
did
推荐题目
 A White House plane  ________ Beijing on March 19, 2014 and US First Lady Michelle Obama started her ________ visit to China. 
#52874
A
reached; seven days
B
landed in; seven-day
C
has arrived in; seven-day
D
has got to; seven days
---- What are you doing?     ---- I’m ________ my English book.
#59023
A
looking after
B
looking at
C
looking for
D
looking like