Past Simple, Present Perfect or Present Perfect Continuous.
1. We
(study) English since
2nd form.
2. Не
(play) tennis for six
years.
3. 1
(not/go) anywhere
yesterday because l(not/feel) good.
4. Jane's hair is too short. She
probably
(have) a haircut.
5. Bill
(buy) a new motorcycle
five days ago
6. It
(rain) since 80'clock.
7. Yesterday!
(come) home at
midnight. I (have) a bath, (drink) some water
and (go) to bed.
8. Why is she crying?-she
(hurt)
her arm.
9.
(you/see) many
monuments when you were in London?

We must not lose a minute, if we want to catch the culprit.We must hurry to the house, or may be too late.The house was empty, apparently shots warned the offender."There is one place where my husband can hide," said Mrs. Stapleton.He knows the path there, but in this fog even he can go astray.It was clear that until the morning can not do anything.He settled in the north of England, but was soon forced to flee and to change its name. My dear Watson, you should not be angry with me. I had to deceive you.  This is a dangerous thing, and I could not leave you alone.It must be, Sherlock Holmes, and I hope that you will shed light on this matter.It must be accepted Stapleton escaped convict Sir Baskerville.

I believe it is true that computers save us a lot of space and time. If you have a good modern computer with the Internet connection, it can replace a huge library with millions of books. This means that computers give us access to the wealth of information that is available on the Internet. They also allow us to analyze massive amounts of data very quickly, saving both our time and money.

Computers can be a great learning tool. For example, I regularly watch educational videos on the YouTube.

On the other hand, I understand those people who worry that we rely on computers too much and this habit can lead to problems with social interaction. That is why it is important to find middle ground between two extremes.