Choose the correct word for the following definition: (of weather conditions) neither very hot nor very cold

Choose the correct word for the following definition:

The amount of money you have in a bank account, or the amount of something that you have left after you have spent or used up the rest

Complete the question asked by the reservations clerk at a hotel.

_________________________?

By credit card.

Travel agent: __________________?

Tour operator: We specialize in adventure travel.

Choose the correct word for the following definition:

the act of giving your attention to only one thing, either as a religious activity or as a way of becoming calm and relaxed

Complete the sentences with the correct tense of the verb.

Between 1950 and 2000 the figure ______ by nearly 28-fold. (increase)

Choose the correct conditional form to complete the following sentence.

I ______ that car if I had had more money at the time.

Choose the most appropriate word to complete the sentence:

The use of pesticides is killing off birds, fish and ______.