When asked why he prefers bikes to buses, the professor said, “Riding a bicycle takes __________ half an hour, but it’s more convenient and environmentally friendly. ”
Selecting a mobile phone for personal use is not an easy task because technology ________ so rapidly.
Visitors ________ not to touch the exhibits.
—Sorry,sir,your car isn't ready yet. It ________ by our workers. —Oh,my God,when can I come to fetch it?
If their marketing plans succeed,they ________ their sales by 20 percent.
The wet weather will continue tomorrow when a cold front ________ to arrive.