Make a plan, an abstract and then a summary of the text

Choose the contextual meaning of the following words.

1. ports a) отверстие b) порт c) канал

2. shell a) кожура b) корпус c) каркас

3. level a) плоский b) уровень с) спокойный

4. bars a) препятствовать b) полосы c) прутья

5. close a) близкий b) закрытый c) перекрывать

6. heads a) герб b) напоры c) верхний бьеф

Match the words with their synonyms.

1) entrance 7) condition a) take away g) manage

2) withdraw 8) face b) intensive h) trash

3) permit 9) debris c) terms i) blocking

4) elaborate 10) severe d) entry j) overlook

5) fluctuation 11) regulate e) complex k) allow

6) accumulate 12) clogging f) instability l) gather

Match the words with their opposites.

1) permit 6) cause a) exit f) aid

2) wet 7) interfere b) prohibit g) dry

3) elaborate 8) tailwater c) simple h) prevent

4) high-head 9) entrance d) head water i) dissipate

5) accumulate 10) present e) low-head j) absent