1) The letters (are being typed) at the moment.
2) Guernica (was painted) by Picasso.
3) The parcel (has not been delivered) yet.
4) Alpha Romeo cars (are made) in Italy.
5) The thief (was arrested) late last night.
6) The announcement (will be made) tomorrow.
7) Good evening ladies and gentlemen. I (am) Charles Trump.
8) I (am reporting) from BBC news headquarters.
9) Earlier this evening an earthquake hit Cairo, Egypt. Many people (were killed);
10) many more (were injured)
11) and much of the city (was destroyed).
12) Emergency teams (have already been set up) all over the city.
13) They (are helping) the injured.
14) Firemen and local people (are digging) in the wreckage 15) as many people (are still trapped).
16) We (are expecting) a special, in-depth report from our reporters at any moment.
17) As soon as we (hear) from them we will release another news bulletin.
18) Anyone who (wish) to enquire about family or friends should ring the following emergency numbers - 010 888 - 38691/2/8/0 for information.
19) We (will be back) with the special bulletin.
20) A BBC special news team (is leaving) for Cairo immediately.
When the engine is opened up after running on the insufficiently washed oil, the entire surface of the combustion spaces in the cylinders has a coating of gritty material which is mostly sodium sulphate.
Troubles arising from air pockets are eliminated by periodical opening of the vent cocks on the cylinder heads.
When for any reason the cooling water supply to part or all of the cylinders fails, the engine should not be kept in operation long while the trouble is being corrected.