I didn’t quite follow him because he explained the theory _____that is too abstract for me.
The project __________ by the end of 2015 will greatly expand the city's telephone network.
)The drinking water in the village is heavily polluted by the chemical works nearby. And __________ with fresh and clean water, the locals appeal to the media.
Having a trip abroad is certainly good for the old couple,but it remains __________ whether they will enjoy it.
The continuous rain __________ the harvesting of the wheat crop by two months.
The play __________ next month aims mainly to reflect the local culture.