【单选题】Recently he______ every night until after one o' clock, preparing for the final exam.
【简答题】Every moring the shop assistants_______(greet) visitors at the gate.
【单选题】Every moring I have milk and bread breakfast.
【单选题】When he was there, he ________ go to that coffee shop at the corner after work every day.
【单选题】Gear pumps are of positive displacement type pumps because they discharge a near constant amount of liquid _____ pressure.
【单选题】The hot oils used for frying ______.
A.
is kept fresh every day
B.
may be used for a week
C.
should be changed every 3 days
D.
is changed from hour to hour
【单选题】'Life is like walking in the snow', Granny used to say, 'because every step [ ]