Birthday Party

　Today, a birthday party was held in our laboratory. We laboratory member are sometimes hold birthday parties when some members' birthdays are approaching. This time, we celebrated birthdays of two members. We cooked grilled beefs and ate them heartily. After we finished eating the meats, we brought a birthday cake and began to eat again. Then, we sent birthday presents to laboratory members whose birthday is approaching. Since one of them likes cherry blossom, we sent shampoo and rinse and lip balm which have good aroma of cherry to him. Also, since the other will graduate soon and begin a new life, we sent a valuable ballpoint pen to him. We had an ace time at the birthday party.

• This time, we celebrated birthdays of two members.
• This time, we celebrated the birthdays of two members.

• Then, we sent birthday presents to laboratory members whose birthday is approaching.
• Then, we gave birthday presents to the laboratory members whose birthday was approaching.

• Since one of them likes cherry blossom, we sent shampoo and rinse and lip balm which have good aroma of cherry to him.
• Since one of them likes cherry blossom, we gave cherry scented shampoo, rinse and lip balm to him.

• Also, since the other will graduate soon and begin a new life, we sent a valuable ballpoint pen to him.
• Also, since the other will graduate soon and begin a new life, we gave him a fancy ballpoint pen.

• We had an ace time at the birthday party.
• We had an ace time at the birthday party.

  The sentence is correct, but it sounds more natural to say that you had an excellent time/ a great time.

• After we finished eating the meats, we brought a birthday cake and began to eat again.
• After we finished eating the meats, we brought a birthday cake and began to eat again. (or: ...cake and continued our feast)

• Since one of them likes cherry blossom, we sent shampoo and rinse and lip balm which have good aroma of cherry to him.
• Since one of them likes cherry blossom, we sent shampoo, rinse and lip balm which have good aroma of cherry to him.

Nice!