Explanation

In this sentence, "didn't we" is the correct tag question for the past perfect tense ("had to").

It properly matches the verb tense of the main clause

Explanation

A  norm-referenced assessment evaluates students' performance by comparing their results to those of a norm group, which consists of a representative sample of students. 

Explanation

In the sentence, "played" functions as the past participle of the verb "play."

The past participle is used in this context to form the passive voice ("was played"), indicating that:

the match was played by someone (the subject of the sentence is not specified)

and then shown on TV.

Explanation

Memories are part of the knowledge domain 

This process is essential for learning, understanding past experiences, and applying acquired information to new situations.

Explanation

History:

Under the One China policy since 1949

Honduras maintained relations with the ROC on Taiwan for an additional 74 years

Until it shifted recognition to the PRC on 26 March 2023

China has an embassy in Tegucigalpa.

Honduras has an embassy in Beijing.

Explanation

OpenAI launched ChatGPT on November 30, 2022.

This AI chatbot quickly gained attention for its conversational abilities and broad range of applications.

Explanation

For one digit number 1 to 9

→1 × 9 = 9

For two digit number 10 to 99

→ 2 × 90 = 180

For three digit number 100 to 300

→3 × 201 = 603

Hence, total number of required digits

= 9 + 180 + 603 = 792

Explanation

The sentence is an example of "inversion."

It places the auxiliary verb "do" before the subject "the managers" to emphasize the rarity of the managers' responses.

Explanation

The inverted commas part shows "perfect infinitive tense."

It is used to express an action that was completed before another action, in this case, "to have acted properly."

Explanation

Sum of m numbers = mn^2

Sum of n numbers = nm^2

∴ Average of (m + n) numbers

= mn(m+n)/(m+n)

= mn