I have already forgotten ______ you bought the computer.

_____ you didn’t know the rules shouldn’t be an excuse for your failure to report.

“______ the friendship between our two people last forever!”, and with this sincere hope, the president concluded his speech.

Jack can’t concentrate on his study recently． — Yes, that might ____ why he did so badly in the last test．

When she came several days later, she found that all things still ______ where she had ________ them.