．—You've dropped ________ “s” in the word “acros”．—Oh, ________ letter “s” should be doubled like this “across”．
#7656
A
a; a
B
an; a
C
an; the
D
the; the
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If you buy more than ten, they knock 20 pence off ______.
#10460
A
a price
B
price
C
the price
D
prices
Cooking calls for ________ patience and time but it is ________ enjoyable experience.
#7816
A
a; the
B
不填；an
C
the; an
D
a; 不填
—Would you mind giving your advice on how to improve our business management?—If you make ________ most of the modern equipment, there will be ________ rise in production.
#7820
A
不填；不填
B
the; a
C
不填；a
D
the；不填
There are over 58,000 rocky objects in ______ space, about 900 of which could fall down onto ______ earth.
#8844
A
the; the
B
/; the
C
the; a
D
a; /
_________ walk is expected to last all day, so bring __________ packed lunch.
#10265
A
A; a
B
The; 不填
C
The; a
D
A; 不填