Questions

The difference between exports and imports is called the balance of trade. If imports are greater than exports, it is sometimes called an unfavourable balance of trade. If exports exceed imports, it is sometimes called a favourable balance of trade.

Muscle cramping is a common problem encountered by athletes and non athletes alike. Defined as painful involuntary skeletal muscle contractions, cramps may be categorized as either non exercise related or exercise related. Traditionally, such cramping was believed to arise from dehydration, electrolyte imbalances (including magnesium, potassium and sodium),accumulation of lactic acid, or low cellular energy levels.

The error is in third part. Replace ‘good’ with ‘correct’. English is not good or bad, but it can be correct or incorrect. We can also say ‘All of them speak English well’, or ‘All of them speak fluent English’. The error remains in part c.

South Korea has launched its first military satellite named ANASIS-II. This military communication satellite was launched by SpaceX and is expected to reach its orbit in next two weeks. The satellite has been launched with an aim to enhance Korea's ability to defend itself against the North Korea.

The Military of South Korea is likely to take over the satellite system in October 2020.