The answer is after "Unfortunately". The sentence should read, "Unfortunately, <span>we had not brought our reusable water bottles and had to buy bottled water." I hope this helps!</span>
"Has the warning bell rang yet?" would be the best option from the list in terms of a participle. It often helps to say these types of sentences out loud to determine the right fit.
Answer:
They intensified their efforts to increase sales
I would say that there is no other living thing on earth that can react to medical testing like animals can, for example, testing it on plants wouldn't do us any good. but if you tested it on animals and it changed their hair purple or something then you gained new information that with out testing would have been unknown.
if you have options then I can help more, since it says "would most weaken"