Ôn luyện

Abner Doubleday, ..............., was credited with the invention of baseball in 1839.

The loudspeakers won’t work unless you                     those cables.

Please don’t touch anything before the police                                .

By next month, I                            my first novel.

The commander gave                                     talk to his men.

I haven’t seen you for ____. How are things?

They both have brown eyes because the brown gene is                        .