Even the smallest pulley can be done stronger by adding wheels to its system to create more leverage

Hurry! We're got to leave the house immediately. Otherwise, __________ the opening ceremony. 

One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them: 

If I were you, I will go to the dentist’s and have the tooth checked. 

Pele encourage Ronaldo to take part in 2012 World cup.

Many hundred years ago, there were many villages and little towns in England

I’ve got my photos drying out on the kitchen floor, so whatever you will do, don’t tread on them!

Many scientists contributed to the development of television, whether no one can be said to have invented it.

The function of pain is to warn the individual of danger, so he can take action to avoid more serious damage.

Before we returned from swimming in the river near the camp, someone had stole our clothes, and had to walk back with our towels around us.

Few people realize that the musician of the national anthem of the United States originally belonged to the British drinking song.

The average salt content of seawater is more than three percents

Either humans and animals learn by experience, and what is learned influences the planning and carrying out of simple actions.

Listening to music on tape or even on disk is not nearly as good as to go to a live concert.

Choose the correct answer to complete the sentence. "Land erosion is mainly caused by widespread _______"

I found it difficult convincing the ticket inspector that I had lost my ticket, but he believed me in the end

Physiologically, the period of adolescence is marked by active growth, especially in the skeletal and muscular systems and in a certain

President Wilson had hoped that World War I be the last great war, but only two decades later, the Second World War was erupting

____, please paint the windows before you leave. 

Before the formation of labor unions, individual workers had almost not voice in determining their wages, hours, or working conditions.

Are there enough champagne to go round ? Will everybody get a glass?

He was so careless that he left the work half doing and went to the cinema.