______is estimated that a round-trip to Mars would take more than a year.A,That B,what C,There D,It
These continual _____ in temperature make it impossible to decide what to wear.
All foreign visitors are requested to _____ with the regulations in this area.
Thomas Edison considered genius to be _____ one per cent inspiration and ninety-nine percent perspiration.
. Although Lucy was slimming, she found cream cakes quite _____.
. In order to _____ the rising production costs, the subscription rates have been increased.