When they got there, they found the people suffering the storm were _____ food and water supplies[ ]

Mr. Blake __________my letter, otherwise hewould have replied by now.

We used to see each other ______, but I haven’t heard from him since last year[ ]

Our country is teaching the young __________ should be true values of life by publicizing the deeds of scientists and real heroes.

We haven’t seen each other for 20 years, but I recognized him _____ I saw him．Which of the following is wrong ?