We need wither a nail_______ a screw to hang this picture.

Protecting Florida’s coral reefs is difficult because some of the corals are very fragile even the touch of a diver’s hand can kill it.

Learning Spanish isn’t so difficult once you ______.

River transportation in the United States consists primarily of barges pull by towboats.

I'm not sure a thank you letter is really necessary. _______, I can't be bothered to write one.

If his grades had been better, he would accept as a graduate student on the MBA program.

Some conifers, that are tree that have cones, are able to thrive on poor, thin soil

Venus, the second planet from the Sun, is exactly almost same size as the Barth.

Near equator, the slant of the Sun’s rays is never great enough to cause temperatures to fall below the freezing point.

Karen hasn’t decided still if she wants to run for the Presidency again this year.

The weather in Dalat is neither too hot in summer________ too cold in winter.

He agreed to go climbing_______ he hated heights.

I hadn’t understood his directions. However, I asked him to repeat what he’d said.

The first thing she did when she got to the hotel was to put her rings and other values in the safe provided

The discover of gold and silver in the rugged mountains of Nevada in 1858 attracted many fortune-seekers to that area 

We decided not to go out for a meal_______ we were simply too tired.

Woody Guthrie wrote thousands of songs during the lifetime, many of which became classic folk songs .

The fossil remains of much extinct mammals have been found in the tarpits at Rancho La Brea in Los Angeles

Because helicopters are capable of hovering in midair, they are particularly useful for rescue missions, military operates, and transportation

If we come home on time, our step-mother will be angry.

Before bridges were built, all transport across major rivers in the area were by ferryboat.